520893616321 has 4 divisors (see below), whose sum is σ = 560962356052. Its totient is φ = 480824876592.

The previous prime is 520893616301. The next prime is 520893616361. The reversal of 520893616321 is 123616398025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 163814467600 + 357079148721 = 404740^2 + 597561^2 .

It is a cyclic number.

It is not a de Polignac number, because 520893616321 - 2⁵ = 520893616289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520893616301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20034369846 + ... + 20034369871.

It is an arithmetic number, because the mean of its divisors is an integer number (140240589013).

Almost surely, 2^520893616321 is an apocalyptic number.

It is an amenable number.

520893616321 is a deficient number, since it is larger than the sum of its proper divisors (40068739731).

520893616321 is a wasteful number, since it uses less digits than its factorization.

520893616321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40068739730.

The product of its (nonzero) digits is 466560, while the sum is 46.

The spelling of 520893616321 in words is "five hundred twenty billion, eight hundred ninety-three million, six hundred sixteen thousand, three hundred twenty-one".